A.升高 B.降低 C.基本不變
A.25%→30%→100% B.10%→50%→80%→100% C.11%→33%→100% D.15%→35%→60%→100%
A.洗爐墻約5%、洗爐缸2~3% B.洗爐墻2~3%、洗爐缸5% C.均為2~3% D.均為5%左右
